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题名: Study on the morphogenesis of foetus and reproductive regularity of the finless porpoise, Neophocaena phocaenoides
作者: Jiang Xinfa
通讯作者: Inst. Hydrobiol., Chinese Acad. Sci., Wuhan 430072, China
刊名: Acta Hydrobiologica Sinica
发表日期: 1995
卷: 19, 期:3, 页:210-215
收录类别: 其他
英文摘要: At the early development of the embryo, short bristles were observed on each side of upper jaw in Neophocaena phocaenoides. The number of the bristles varied from 1-3 on the left and 2-3 on the right. Semicircle ear outline was visible. The penis of male foetus was exposed out of body. The swimming organs (flipper, fluke and midway anus to fluke notch) developed prominently. As embryo developed, external ear outline of foetus disappeared and the penis of male foetus concealed in the penial pouch. These morphological changes in the course of the embryo development indicated that cetacean ancestor might have lived on land and that cetacean adapted to water environment when coming into water secondly. In addition, statistical analysis on 17 foetuses and juveniles showed that: the growth rate of foetus was 9.08 cm/month (0.303 cm/day) in Neophocaena phocaenoides, the gestation period may be about 9.4 months in Neophocaena phocaenoides in the Yangtze River, and mating may take place from June to August, parturition time from March to May each year.
ISSN号: 1000-3207
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/17699
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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Recommended Citation:
Jiang Xinfa.Study on the morphogenesis of foetus and reproductive regularity of the finless porpoise, Neophocaena phocaenoides,Acta Hydrobiologica Sinica,1995,19(3):210-215
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文件名: Study on the morphogenesis of foetus and reproductive regularity of the finless porpoise, Neophocaena phocaenoides.pdf
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